4-2 Standard Form of a Quadratic

Which of the following equations matches standard form of a quadratic?

• ax + by = c
• y = a(x - h)² + k
• y = ax² + bx + c
• y = mx + b

Tags

CCSS.HSA.CED.A.1

What is the "formula" for finding the axis of symmetry? 

•  $y=ax^2+bx+c$  

•  $x=\frac{-b}{2a}$  

•  $y=mx+b$  

•  $x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$  

Tags

CCSS.HSA.REI.D.10

___________ is the x value of the vertex

• The axis of symmetry

• b

• c

• a

Tags

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

How do you find the y value of the vertex after calculating the axis of symmetry?

• plug the axis of symmetry back into the original function

• use the same number

• look at the graph

• use the y intercept

Tags

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

What is the axis of symmetry for the following equation?
y=4x²-8x+9

• x=-8
• x=1
• x=-1
• x=2

Tags

CCSS.HSA.REI.B.4

What is the axis of symmetry?
y = 3x² - 6x + 4

• x=1
• x=-6
• x=2
• x=-1

Tags

CCSS.HSA.REI.B.4

What is the axis of symmetry?
f(x) = x² - 8x + 15.

• x = -4
• x = 4
• y = 4
• y = -4

Tags

CCSS.HSA.REI.B.4

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

What is the y intercept for the following equation?

y=4x²-8x+9

• 8

• 9

• -8

• -9

What is the y-intercept?
f(x) = -2x² + 4x - 6

• (0, 6)
• (0, -6)
• (6, 0)
• (-6, 0)

Tags

CCSS.HSF-IF.C.7A

Determine the y intercept of the parabola:

y = 5x² - 20x + 13

• (0, 13)

• (13, 0)

• (2, -7)

• (0, -13)

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.B.4

CCSS.HSA.REI.D.10